package org.example.controller;


import jakarta.validation.constraints.Pattern;
import lombok.extern.slf4j.Slf4j;
import org.example.pojo.Result;
import org.example.pojo.User;
import org.example.service.UserService;
import org.example.utils.JwtUtil;
import org.example.utils.Md5Util;
import org.example.utils.ThreadLocalUtil;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@RestController
@Slf4j
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;

    /**
     * 注册功能的实现
     * @param username
     * @param password
     * @return
     */
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password) {
            // 查询用户
            User u =  userService.findByUserName(username);
            if (u == null) {
                // 没有占用
                userService.register(username, password);
                return Result.success();
                // 注册
            } else {
                // 占用
                return  Result.error("用户名已占用");
            }


    }

    /**
     * 登录功能的实现
     * @param username
     * @param password
     * @return
     */
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password) {
        // 根据用户名查询用户
        User loginUser = userService.findByUserName(username);

        // 判断是否查询到
        if (loginUser == null) {
            return Result.error("用户名错误");
        }

        // 判断密码是否正确 loginUser的password是密文
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            // 登录成功
            Map<String, Object> clams = new HashMap<>();
            clams.put("id", loginUser.getId());
            clams.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(clams);
            return Result.success(token); //返回携带的token
        }

        return Result.error("密码错误");

    }


    @GetMapping("/userInfo")
    public Result<User> userInfo (/*@RequestHeader(name = "Authorization") String token*/) {
        // 根据用户名查询用户
//        Map<String, Object> map = JwtUtil.parseToken(token);
//        String username = (String) map.get("username");

        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        log.info("user info: {}", user);
        return Result.success(user);

    }

    @PutMapping("/update")
    public Result update (@RequestBody @Validated User user) {
        // 更新用户的更新时间
        user.setUpdateTime(LocalDateTime.now());
        userService.update(user);
        return Result.success();
    }


    @PatchMapping("/updateAvatar")
    public Result updateAvatar (@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();

    }


    @PatchMapping("updatePwd")
    public Result updatePwd(@RequestBody Map<String, String> params) {
        // 1.校验参数
        String old_pwd = params.get("old_pwd");
        String new_pwd = params.get("new_pwd");
        String re_pwd = params.get("re_pwd");
        if (!StringUtils.hasLength(old_pwd) || !StringUtils.hasLength(new_pwd) || !StringUtils.hasLength(re_pwd)) {
            return Result.error("缺少必要的参数");
        }

        // 原密码是否正确
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        // 调用userService根据用户名拿到原密码 然后跟加密后的密码对比
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(old_pwd))) {
            return Result.error("原密码填写不正确");
        }

        // 新密码跟确认新密码是否一致
        if (!new_pwd.equals(re_pwd)) {
            return Result.error("两次填写的新密码不一致");
        }

        // 调用userService完成新密码更新
        userService.updatePwd(new_pwd);

        return Result.success();



    }


}
